isc-dhcpd - not logging client transactions

[Chris Buxton]

Your syslog socket should always be /dev/log, relative to the chroot directory. So, probably:

/var/db/dhcpd/dev/log

Note: dev != var

Chris Buxton
BlueCat Networks

On Jun 8, 2012, at 5:14 AM, Ewald Jenisch wrote:

> On Wed, Jun 06, 2012 at 11:49:38PM +1000, Glenn Satchell wrote:
>> Not sure of the exact timing the chroot() call uses, but typically config
>> files, logging device (/dev/log), etc, are opened before the chroot()
>> call.
>> 
>> Otherwise check if there is a dev/log socket inside the jail directory
>> structure. If not you'll need to create it using mknod.
>> 
> 
> Hi,
> 
> In the meantime I did a couple of tests - here's what I found out:
> 
> First I changed syslogd to listen to an additional socket in
> /var/db/dhcpd/var/log. Upon (re)start of syslogd this socket is
> created automatically. When I do a "ps" I also see that syslogd is
> listening to this socket.
> 
> In my dhcpd.conf I've got log-facility local7 and in my
> /etc/syslog.conf I've got 
> 
> local7.* /var/log/dhcpd.log
> 
> As far as I understand syslogd should pick up logs that dhcpd
> writes to /var/db/dhcpd/var/log
> 
> So after restarting syslogd and dhcpd I expected to see the
> transactions being written to /var/log/dhcpd.log - however this
> obviously doesn't work and I still wonder as to why...
> 
> One thing remains though: How does dhcpd know where in its chrooted
> filesystem it should find the corresponding logging socket? Maybe the
> problem is that (chrooted) dhcpd can't find that particular socket
> where the non-chrooted syslogd is listening to (?)
> 
> -ewald
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